Collapsible easel



FIG. 1 is a perspective view of a collapsible easel showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof; and,

FIG. 4 is a collapsed view thereof.

The broken lines in FIG. 1 and showing a board are for illustrative purpose only and form no part of the claimed design. 

The ornamental design of a collapsible easel, as shown and described. 